Method of forming pipe-joints.



U. B. DIMIUK;

METHOD OF FORMING PJP E J'OINT S.

APPLICATION HLED FEB. 25. 1916- Patented Jan. 2;, 191?.

. am ne/m to l-TED STATES DANIEL BWDIMICK, F BIRMINGHAM, ALABAMA, -ASSIGNOR TO AMERICAN CASTING OFFICE.

column, or BIRMINGHAM, ALABAMA, A conron 'rroN or LABAM To all whom it may concern: I

Be it known that I, DANIEL B. DIMIOK, a citizen of the United States, residing at Birmingham, inthe county of Jefferson and State of Alabama, have invented certain new and useful Improvements in Methods of Forming Pipe-Joints; and I do hereby declare the followingto be a full, clear, and exact de scription of the invention, such as will enable others skilled in the art to which it appertains'to make and use the same. a

The present invention relates to improvements in methods of forming pipe joints, and

hassfior-an "object more particularly .to providean improved. method. for effecting fluid-'- ti *ht joints between pipe sections. 1 a

- ith theioregoing and other ob ectsin view the invention consists in the steps and processes more particularlyherein afterdescribed and claimed;

.Theinvention will be more fully understood by reference to the accompanying drawings, in which the same parts are indicated by similar reference numerals through- I out the several views, and in which Figure l is a perspective view of a pair of disassembled pipe sections; Fig. 2 is a central longitudinal sectional view of a single pipe section arranged to receive the plastic gasket; Fig. 3 isa longitudinal sectional view of the adjacent ends of a pair of pipe sections illustrating the gasket, as molded in;

place; Fig. 4 is a view similar to Fig. 3, illustrating the sections assembled-together on the gasket; Fig. 5 is an assembled view of the sections with the extending portion of the gasket-ironed down;v and Fig. 6 is an elevational view of the ironing tool.

Broadly stated, the improved process consists inattaching'to the'meeting end of one pipe section a permanently-plastic gasket possessing the property of strongly adhering to the'iron, or other material, of which the pipe is constructed; and with a projecting portion extending into-the pipe. passage, which projecting portion is subsequently.-

ironed down over the interior of the pipe ends to provide a fluid-tight joint therebe-" tween. l 7 Referring more particularly to the drawings, 1' and '2 designate adjacent sections of" pipe having, respectively, spigot and bellshaped meeting ends 3 and 4, provided each with circumferentially-spaced, wedge-shaped assembled are now in; readiness to be assembled, assembled position is shown in Fig. 4. p g

The sections are assembled in the'mann'er Y above indicated by rotation, and when so" assembled the same will compress there-- METHOD OF FORMING PIPE-JOINTS.

Specification or Letters'l'atent. Patented Jan. 23, 1917. Application filed February 25,-1818. Serial No." 80,430. i

lugs- 5 and for cooperating to form an lnterlocklng coupling when the sections are in the manner illustrated in Figs.

4 and 5.

the sbctions l and 2, the lugs 53 are arranged to be received within the spacesbetweenthe lugs 6 on the adjacent hell 4, whereupon the sections are relatively rotated to inter-en- It willbe understood thatlin assembling gage said lugs,- andby virtue of the tapering rear faces, or wedge'formation of the same, they will cooperate to forcibly move the pipe sectionslaxialiy, and bring the meetin ends thereof into tight engagement, thus e acting .a goodjointbetween the same. e In accordance with the present invention,

one section 2 of the pipe is disposed upright, as indlcated' in Fig. 2, with the hell 4 uppermost in readiness to receiveaplastic asket which is caston' the shoulder of the be 1 and between the outer wall thereof andajring'f, of any 'suitablematerial, preferably aluminum, to, which the gasket will not adhere. The ring 7 is provided with a flange 8 of lesser diameter, and projecting upwardly therefrom with respect to the position illustrated in Fig. 2, to rovide with-the adjacent portions ot the bel 4 a circular'cavity of rectangular cross-section for receivin ten material, .which is poured t erein through the upper end of the pipe and permitted to freeze onnthe end'of' the pipe to provide a permanently-plastic gasket, shown in place at 9 in'Fig. 3. This gasket 9 is cast with a pro ecting portion 10, which appears to advantage in Fig. 4 as extending within the pipe passage. After the material of which the gasket-9 is formed has sufiic'ie'ntly hardened, the pipe section 2 is turned to the position as shown in Fig. 3, and the ring 7 withdrawn rearwardly through the pipe, as indicated in' this figure, ,The pipe sections between, the plastic gasket 9 causing the same to flow into the crevices in the meeting ends of the pipe, and adapt itself to any inequalities therein, thereby forming a tight joint. After assembly, the projecting por1 tionlO of the gasket 9 is pressed down, as

indicated at 11 in Fig. 5, to bridge and cover whic f the interior of the pipe sections, and this operation is preferably done by hot-ironing in order to provide a fluid-tight joint. The gasket will therefore he of a material which will readily melt under the influence of a relatively low degree of heat, and this ironing process is preferably accomplished by an operative with the implement shown in Fig. 6, which may be advantageously acommon form of blowtorch 12, having attached thereto a shoe or iron 13, which is brought into contact with the portion 10 of the gasket and, readily fusing the same, will spread the material over the joint and cause said material to adhere to the opposite pipe sections; thus efi'ectually closing thd same against the entrance or exit of fluid.

This method is primarily intended for pipes of a large size, such as sewer or Water pipes and the like, where a man can get into the interior of the pipe; where a smaller pipe is used an extension bar is used, carrying a heated cast iron shoe.

' It will be understood that I do not desire to be limited to the use of this method on any particular formation of pipe sections, or interlocking pipe couplings; nor do I desire to restrict myself to any particular composition of matter for the gasket 9, 10; norto any particular form of implement for carrying out said process; and it will be obvious that various changes and modifications may be made in the herein described steps and processes without departing from the spirit of my invention, and I reserve to myself the right to all such modifications of the method as come within the scope of the appended claims.

1. The method as described for forming a joint between pipe sections consisting in placing a gasket between said pipe sections having a projecting portion extending into the pipe passage, and pressing said projecting portion down to cover the joint, substantially as described.

2. The method as described for forming a joint between pipe sections, which consists in placing a plastic gasket between said pipe sections having a projecting portion extending into the pipe passage, and pressing said pro ecting portion down with the application oi heat to cover the joint, suhstantiaiiy as described.

3. The inetl'md as herein described in forming a joint between pipe sections, whi consists in. casting a plastic gasket on one section with a portion extending into the pipe passage, bringing the pipe sections to gether on said plastic gasket, and smoothing down with the application of heat such ex ing a fluid-tight joint between interlocking pi )e sections, which consists in castin on one section a permanently-plastic gasket having a portion extending into the pipe passage, bringing said pipe sections forcibly together over said gasket by a rotating movement to interlock the same and compress the gasket therehctween, and subsequently ironing down with theapplication of heat such extending gasket portion to cover the interior of the joint, substantially as described.

6. The herein described method of forming a. joint between metallic pipe sections, which consists in casting on one section a permanently-plastic gasket possessing strong metallic adhering qualities and having a portion thereof extending into the pipe pas sage, bringing said sections together on said gasket, interlocking said sections for comprcssingihe gasket to How into the crevices o't' the-adjacent section and adhere thereto, and ironing said extending gasket portion down over the interior of the joint to render the same fluid tight, substantially as described.

In testimony whereof I atiix my signature.

DANIEL B. DIMICK. 

